nounEtymology: probably from neutralDate: 1932
an uncharged elementary particle that has a mass nearly equal to that of the proton and is present in all known atomic nuclei except the hydrogen nucleus
• neutronicadjective

neutron — [no͞o′trän΄, nyo͞o′trän] n. [ NEUTR(AL) + ON] Particle Physics an uncharged nucleon having a mass of c. 1.675×10 27 kg ( c. 939.5729 MeV/c2, c. 1,839 times the mass of an electron): a free neutron, as in nuclear fission, has a half life of c.… … English World dictionary